There were a ton of parties at Great Wall of China on the 28th, and I lent my belay setup to a small band of top ropers and leaders after leading one of the 5.8/5.9 pitches. When I got down from another climb, my top rope and anchor was there, but the party and grigri + carabiner was gone. Each has a yellow nail polish mark. If anyone has contact info, please pm me. We talked for a bit and I believe the party that has it is also from the bay. I think it was an accidental grab.